Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
A study was conducted to determine the incidence of subclinical mastitis infections in one herd of 32 Guernsy cows. The California Mastitis Test (CMT) was used to determine the level of mammary gland inflammation. Individual quarter milk samples were collected for the isolation and identification of mammary gland pathogens.
"Subclinical Mastitis: A case history,"
Iowa State University Veterinarian: Vol. 42
, Article 2.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol42/iss3/2